update Makefile.lite system to work on x86_64 linux
diff --git a/src/test_libFLAC/Makefile.lite b/src/test_libFLAC/Makefile.lite
index 9ac773d..9014912 100644
--- a/src/test_libFLAC/Makefile.lite
+++ b/src/test_libFLAC/Makefile.lite
@@ -26,7 +26,7 @@
 
 INCLUDES = -I../libFLAC/include -I$(topdir)/include
 
-ifeq ($(DARWIN_BUILD),yes)
+ifeq ($(OS),Darwin)
 EXPLICIT_LIBS = $(libdir)/libgrabbag.a $(libdir)/libreplaygain_analysis.a $(libdir)/libtest_libs_common.a $(libdir)/libFLAC.a $(OGG_LIB_DIR)/libogg.a -lm
 else
 LIBS = -lgrabbag -lreplaygain_analysis -ltest_libs_common -lFLAC -L$(OGG_LIB_DIR) -logg -lm